Im afraid to launch after the download, would it force me to download this again? I guess only time will tell :/

Copy and paste the STO client to somewhere else just in-case, then if it starts re-downloading again you still have a client, or you could not and if it starts downloading again just go bomb the Steam building.

The most annoying thing is i cant even moan on the Steam Forum because i didn't have an account, and now im signed up i have to wait for some **** wit to enable my posting abilities or some crap, weird :p

Copy and paste the STO client to somewhere else just in-case, then if it starts re-downloading again you still have a client, or you could not and if it starts downloading again just go bomb the Steam building.